腐植酸叶面肥对苹果品质和产量的影响

以腐植酸叶面肥为试材,以"红富士"苹果为研究对象,采用大田试验方法,分别设定5个不同腐植酸浓度(0(CK)、0.2、0.4、0.6、0.8 g·L^-1),通过测定果实产量、维生素C、可溶性糖、可滴定酸、干物质、果径、硬度,比较不同浓度处理对苹果产量和品质的影响,以期为腐植酸叶面喷施技术在苹果栽培中的应用技术提供浓度参考。结果表明:喷施腐植酸的果实单果质量和产量与对照相比均有所增加,当用量为0.4 g·L^-1时均达峰值,同时能减小果实硬度,增大果径,提高商品率;果实可溶性糖含量均有所提高,适当的浓度能降低可滴定酸含量,提高糖酸比;干物质含量和维生素C含量均有所增加,干物质含量最高可增加4.0%,维生素C含量最高可增加13.65 mg·(100g)^-1。产量和果实品质各指标回归拟合表明,腐植酸浓度与产量和各指标均存在显著的二次相关关系,产量最高时腐植酸浓度为0.52 g·L^-1,果实品质各指标最优时腐植酸浓度均在0.38～0.59 g·L^-1。

Effect of Humic Acid Foliar Fertilizer on Apple Quality and Yield

Humic acid was used as material,the apple variety of ‘Red Fuji’ was used as experimental object,with the field experiment,the differences among different levels of humic acid treatment were investigated at 0(CK),0.2,0.4,0.6,0.8 g·L^-1 mass concentration.The effects of humic acid concentration on the yield and quality of apples were studied by measuring fruit yield,vitamin C content,soluble sugar content,titratable acid content,dry matter content,fruit diameter,hardness for the application of humic acid foliar application technology in apple cultivation,in order to supply references for humic acid application in apple production.The results showed that the fruit quality and yield of the fruit sprayed with humic acid increased compared with the control.When the dosage was 0.4 g·L^-1,the peak value was obtained,and the fruit hardness was reduced,the fruit diameter was increased,and the product rate was improved;the soluble sugar content of the fruit was improved,the appropriate concentration could reduce the titratable acid content,increase the ratio of sugar to acid;the dry matter content and vitamin C content increased,the dry matter content could increase by 4.0%,and the vitamin C content was the highest.It could be increased by 13.65 mg·(100 g)^-1.The regression fitting of yield and fruit quality indexes showed that there was a significant secondary correlation between humic acid concentration and yield and each index.When the yield was the highest,the humic acid concentration was 0.52 g·L^-1,and the fruit quality was the best when rot.The acid concentrations were all in the range of 0.38-0.59 g·L^-1.